Type bar segment and anvil



- June 16, 1936- H. c. SHEPARD 2,044,641

TYPE BAR SEGMENT AND ANVIL Filed. Feb. 12, 1934 /8 Hum a; w \\\\\\\\\\\\W \\\\\\\\\\\\\\\ui)/9 Patented June 16, 1936 r i cits!) stares .FATENT- OFFICE Remington Rand Inc., New York, N. Y., a cor-- 'poration of Delaware Application February 12, 1934, Serial N 710,953 Claims; (01. 197-183) My invention relates to typewriting and like verse sectional view of the segment and anvil machines and more particularly to type barsegtaken on the line ld of Fig. 1 and looking in ments and anvils. i a j e the direction of the arrows at said line.

It has been customary heretofore to make the Fig. 5 is a like view of the same showing one of 5 usual slotted type bar segment of cast iron, the the screws which secures the anvil in'place as it 5 use of cast iron being preferableto facilitate manappears after the outer head has been twisted off ufacture and to readily provide proper bearing and before the projecting portion of the inner surfaces for the heels or fulcrumed ends of the head has been ground down. a type bars. In thejmanufacture of such cast iron Fig. 6 is a corresponding view showing one of segments it has been customary to formintegral said screws as it appears when the anvil has been therewith an anvil that is located near the fu1 Secured p but before h 1 a a crumed ends of the type bars, so that each type been twisted ofi.

bar in its approach to the printing position con- In the accompanying drawing It represents tacts with the anvil in such a manner that the the usual cast iron segment but which in the pres type bar is arrested just before the face of a ent instance is devoid of the integral anvil or- 15 type thereon strikes the platen, the impression bedinarily provided thereon. a This segment is proing made on the platen, or thepaper carried vided with the usual seat or recess II in which 3' thereby, by an overthrow or spring of the free end segmental pivot wire I2 for the type bars I3 is portion of the type bar which extends beyond the received, the. heel of each of said type bars operl point were it is arrested by the anvil. 'In order ating in a slot I lin the lower edge portion of the to provide proper efiective imprints from the type segment and being guided by the side walls therebars the contact face of the anvil should be of. A segmental anvil l5 which is preferably maintained in a very exact relationship. to the made of hardened tool steel is provided with ype bill fu Wire and the pla en. In the counter-sunk openings I 6 therein. These openusual construction the effectiveness of this cast ings, when the anvil is in position for use, register iron anvil is of comparativelyshort duration due with tapped openings ll that extend through the to the fact that the hard steel type bars soon Wear bodyof the segment. The counter-sunk per.- or cut into the anvil to such an extent as to seritions of the openings it are at front of the anvil Gusly pa r the printing. to receive correspondingly shaped inclined sur- One Of the main j s my t onis 7 faces of the inner heads l8 of screws l9 which v e these difilculties and DYOVidB means o are preferably made of hardened tool steel. Each effectively securing a hardened tool steel anvil screw ha s a double head thereon comprising the o a c t iron se m t and for bringing thoooninner-head it and an outer head 20, the latter tact face of the anvil into proper relationship wi h being provided with a slot 2 I' to receive the end of j the pivot W for the yp barsl a screw driver. A. reduced portion 22 inter- 5 T0 the above and other d which w evenes between the inner and outer heads of each inafter appea y invention c ts in the feascrew to form a weakened portion that enables tures of construction.arrangements of parts and th ut r h d 29 to be readily twisted off the combinations of devices set forth in the follow inner head I8, leaving the screw in some such in i s description and particularly pointed out in condition as that indicatedinFig. 5. When each t e a c p yi g claims. screw l9 has been threaded home to firmly se- In t e a co pa y drawing wherein like cure the anvil I5 to the segment, as shown in Fig. referencecharacters indicate corresponding parts 6, th uter head of said screw will be twisted off, inthe different vieWs-- leaving the parts somewhat as shown in Fig. 5.

1 is a front V w O a ype bar segment and The segment is. then set up and the broken off anvil constructed in accorda ce W t t e p protruding ends of the screws l 9 are ground down ent invention, together with some of the ass0- flush with the contact face of the anvil and such ciated parts. contact face and the heads l8 are ground down Fig. 2 is an enlarged, detail, vertical, sectional an appropriate amount to accord with the posiview of the same showing a type bar in contact tion of the pivot wire l2, in order that each type 50 with the anvil. 7 bar will be arrested by the anvil in proper posi- Fig. 3 is a perspective view of an anvil contion to afford an accurate and proper imprint by structed in accordance with my invention but an overthrow of the free end of each type bar in shown detached. its impact against the platen 23 or the paper Fig. 4 is an enlargeddetail, fragmentary, transthereon. 55

By grinding down the contact face of the anvil and the heads IS in the manner described a hard, continuous, unbroken, exact, substantially wearproof contact surface is provided on the anvil for the type bars to strike against.

By fixedly attaching the hardened tool steel anvil to the face of the cast iron segment in the manner and by the means hereinbefore pointed out, the construction can be readily and cheaply produced, facilitating an accurate manufacture of the parts to attain the results pointed out.

Changes in the construction hereinbefore described may be made without departing from my invention as it is defined in the accompanying claims.

What I claim as new and desire to secure by Letters Patent is: g h

1. A type bar segment and anvil for typewriting and like machines comprising a slotted type bar segment of cast iron having a seat therein for the type bar pivot wire and tapped openings that extend through said segment, and a hardened tool steel anvil firmly secured throughout its extent to the front face of the segment by screws of hardened tool steel that are received in said tapped openings, the front contact face of said anvil and any extending portions of the screws being ground down an appropriate amount to accord with the position of the type bar pivot wire in said seat.

2. A type bar segment and anvil for typewriting and like machines comprising a slotted type bar segment of cast iron having a seat therein for the type bar pivot wire and tapped openings that extend through said segment, and a hardened tool steel anvil firmly secured to the front face of the segment by headed screws of hardened tool steel that are received in said tapped openings, the heads of the screws being located at the front of the anvil, the front contact face of the anvil and the heads of the screws being ground down an appropriate amount to accord with the position of the type bar pivot wire in said seat.

3. A type bar segment and anvil for typewriting and like machines comprising a slotted type bar segment of cast iron having a seat therein for the type bar pivot wire and tapped openings that extend through said segment, a hardened tool steel anvil having counter-sunk openings in the front face thereof, and hardened tool steel screws that are received in said tapped openings and firmly secure the anvil to the segment, each of said screws having a double head with an intervening weakened portion that permits the outer section of the head to be twisted off the inner section thereof after the screw is threaded home, the inner section of each head fitting in the companion counter-sunk opening in the anvil and having the projecting portion thereof ground down flush with the contact face of the anvil after the outer section of the head has been removed.

4. A type bar segment and anvil for typewriting and like machines comprising a slotted type bar segment of cast iron having a seat therein for the type bar pivot wire and tapped openings that extend through said segment, a hardened tool steel segmental anvil against which the type bars strike, said anvil having openings therethrough for the passage of screws, each of said openings being counter-sunk in the front contact face of the anvil, and hardened tool steel screws received in said tapped openings and firmly securing the anvil to the segment, each of said screws having a double head with an intervening weakened portion that permits the outer section of the head to be twisted off the inner section after the screw is threaded home, the projecting a portions of the inner heads of the screws being ground down flush with the contact face of the anvil.

5. A type bar segment and anvil for typewriting and like machines comprising a slotted type bar segment of cast iron having a seat therein for the type bar pivot wire and tapped openings that extend through said segment, a hardened tool steel segmental anvil against which the type bars strike, said anvil having openings therethrough for the passage of screws, each of said openings being counter-sunk in the front contact face of the anvil, and screws received in said tapped openings and firmly securing the anvil to the segment, each of said screws being of hardened tool steel and having a double head with an interven ing weakened portion that permits the outer section of the head to be twisted off the inner section after the screw is threaded home, the inner section of each head fitting in the companion counter-sunk opening and the contact face of the anvil and the broken projecting ends of the inner heads of the screws being ground down an appropriate amount to accord with the position of the pivot wire in said seat after the outer sections of the heads have been removed.

HERBERT C. SHEPARD. 

